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Home/Companies/Monolithic Power Systems, Inc.

Monolithic Power Systems, Inc.

366 insider trades tracked

MPWR
Insider trades
366
Bought (open market)
$0
Sold (open market)
$778.3M
Unique insiders
12

12-month activity

Monthly insider buy vs sell totals for Monolithic Power Systems, Inc..

BuysSells
Show data table
MonthBuysSellsFilings
October 2025$0$21.3M27
November 2025$0$147.8M110
December 2025$0$3.5M14
January 2026$0$3.1M11
February 2026$0$288.5M59
March 2026$0$26M9
April 2026$0$22.1M23
May 2026$0$172M49
June 2026$0$46K1
July 2026$0$20.2M19
August 2026$0$367K9
September 2026$0$00

Recent insider trades

Most recent Form 4 filings for Monolithic Power Systems, Inc..

  • Tseng Sariagifted2,000 shares ofMPWRat $0Aug 31 · filed Sep 2Details
  • DEAN ROBERT W IItraded5 shares ofMPWRat $0Aug 24 · filed Aug 26Details
  • DEAN ROBERT W IIsold32 shares ofMPWRat $1,297.72$42KAug 24 · filed Aug 26Details

Insiders at this company

Executives and directors who have filed Form 4s.

  • Hsing Michael94 trades
  • Sciammas Maurice72 trades
  • BLEGEN THEODORE71 trades
  • Tseng Saria71 trades
  • Elmiger Eugen J14 trades
  • Xiao Deming10 trades
  • Lee Victor K9 trades
  • Zhou Jeff8 trades

Explore insider screeners

Latest CEO & CFO PurchasesLatest CEO & CFO SalesDirector PurchasesOfficer PurchasesTop Purchases This WeekTop Sales This WeekTop Officer Buys (Month)10% Owner Filings10b5-1 Planned TradesDiscretionary TradesBuy/Sell RatiosPolitician-Insider Overlap
  • CHANG KUO WEI HERBERTsold50 shares ofMPWRat $1,281.57$64KAug 24 · filed Aug 25Details
  • DEAN ROBERT W IIsold6 shares ofMPWRat $1,413.64$8KAug 17 · filed Aug 19Details
  • CHANG KUO WEI HERBERTsold50 shares ofMPWRat $1,420$71KAug 11 · filed Aug 13Details
  • DEAN ROBERT W IIsold105 shares ofMPWRat $1,344.27$141KAug 5 · filed Aug 6Details
  • Sciammas Mauricegifted25,000 shares ofMPWRat $0Aug 4 · filed Aug 6Details
  • Sciammas Mauricesold30 shares ofMPWRat $1,343.94$40KAug 3 · filed Aug 5Details
  • DEAN ROBERT W IIgranted1,359 shares ofMPWRat $0Jul 25 · filed Jul 28Details
  • Sciammas Mauricesold110 shares ofMPWRat $1,405.71$155KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold117 shares ofMPWRat $1,400.45$164KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold213 shares ofMPWRat $1,396.16$297KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold410 shares ofMPWRat $1,384.11$567KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold418 shares ofMPWRat $1,378.73$576KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold472 shares ofMPWRat $1,375.47$649KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold240 shares ofMPWRat $1,369.18$329KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold50 shares ofMPWRat $1,359.36$68KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold5,640 shares ofMPWRat $1,352.95$7.6MJul 15 · filed Jul 17Details
  • Sciammas Mauricesold1,506 shares ofMPWRat $1,348.91$2MJul 15 · filed Jul 17Details
  • Sciammas Mauricesold1,864 shares ofMPWRat $1,344.16$2.5MJul 15 · filed Jul 17Details
  • Sciammas Mauricesold1,460 shares ofMPWRat $1,339.59$2MJul 15 · filed Jul 17Details
  • Sciammas Mauricesold776 shares ofMPWRat $1,334.59$1MJul 15 · filed Jul 17Details
  • Sciammas Mauricesold464 shares ofMPWRat $1,329.3$617KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold409 shares ofMPWRat $1,323.93$541KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold274 shares ofMPWRat $1,318.42$361KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold527 shares ofMPWRat $1,314.03$692KJul 15 · filed Jul 17Details
  • Sciammas Mauricesold30 shares ofMPWRat $1,351.61$41KJul 1 · filed Jul 6Details
  • Sciammas Mauricesold30 shares ofMPWRat $1,533.95$46KJun 1 · filed Jun 3Details
  • Sciammas Mauricegifted12,472 shares ofMPWRat $0May 29 · filed Jun 2Details
  • View all trades for MPWR →
    DEAN ROBERT W II
    8 trades
  • CHANG KUO WEI HERBERT5 trades
  • Martinez Carintia2 trades
  • Wynne Eileen2 trades